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Novel broadband microstrip-to-CPW transition with easy transmission band control

Authors
Baik, Jung-WooLee, Tae-HakKim, Young-Sik
Issue Date
25-1월-2008
Publisher
IEICE-INST ELECTRONICS INFORMATION COMMUNICATIONS ENG
Keywords
microstrip line; coplanar waveguide; transition structure; broadband balun
Citation
IEICE ELECTRONICS EXPRESS, v.5, no.2, pp.48 - 52
Indexed
SCIE
SCOPUS
Journal Title
IEICE ELECTRONICS EXPRESS
Volume
5
Number
2
Start Page
48
End Page
52
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/124212
DOI
10.1587/elex.5.48
ISSN
1349-2543
Abstract
A broadband microstrip-to-coplanar waveguide (CPW) transition using two parallel folded balun structures with easy transmission band control for various RF circuits and integrated systems is proposed in this paper. Each balun is employed an open-circuited microstrip line and a short-circuited slotline with one quarter-wavelength long each. As the change of the length of the open and short circuits, the transmission band can be easily controlled. The measured return and insertion losses are better than 10 dB and 1.4 dB, respectively, over the bandwidth of 82.5% at the center frequency of 6GHz.
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